Q12 - I chose A as I misread the passage on my first run through. Instead of realizing that there was a difference in the group of people who studied the limits of oral composition and people who were driven to study archeological/historical background, I thought the passage was saying they were the same group of people :/

Once I listened to JY's explanation of the passage, I got the right answer.

I was also signed up but I didn't receive an email with the link either!

Same :(

Beyond recognizing the assumption of individual buyers immediately, it would be useful to write out the equation of the two relationships mentioned here:

Premise: (Average price paid for a new car / average individual income) is positive (increased for past 25 years)

Conclusion: (Average % individual income spent on new cars today / Average % individual income spent on new cars 25 yrs ago) is positive (increased)

These equations would help eliminate trap choice A, as increased HH wage earners does not immediately effect either equation. It tells you nothing about average individual income today, average price paid for a new car, and average % individual income spent on new cars today.

In fact, increased number of wage earners does not necessarily equate to a higher HH income. Both people could significantly reduce work hours and even end up with an equal or lower HH income.

Fell for the trap answer A, but in my second time looking at the question I realized that there is a leap in logic between the premise and conclusion that D targets. Premise: people who have pets are correlated with being unhappy. Conclusion: If person A wants to be the happiest she can be, she should not get a pet.

D is the alternative possibility - actually, pets are correlated with increased happiness, so those who are unhappy with a pet would be even more unhappy without one. Thus, on average it may appear that pets cause unhappiness even though unhappy people may decide to get a pet at a higher rate in order to become happier